It’s My Birthday Today and to celebrate, here’s all you need to know about birthdays.

The word “birthday” is simply two Old English words joined together: birth and day.

Birth traces back to the Old English byrþ or gebyrþ, carrying the meaning of the act of coming into existence. It connects to the Old English verb beran, meaning to bear or bring forth, which itself descends from the Proto-Germanic beraną, meaning to carry or give birth.

Different language families approach the concept of a birthday in noticeably different ways. Germanic languages tend to use a direct parallel to the English birth plus day construction. German, Swedish, Danish, and Norwegian all follow this pattern. The German Geburtstag, for instance, joins Geburt, meaning birth, with Tag, meaning day, with Geburt descending from Old High German giburt and related to the verb gebären.

Romance languages frequently take a different angle, emphasizing the completion of another year rather than the birth event itself. The Spanish cumpleaños translates literally as “completion of years,” built from cumplir, to complete or fulfill, and años, years. Latin expressed the idea as dies natalis, meaning day of birth, with natalis rooted in natus, born, from the verb nasci. That same Latin root gave English the words natal and nativity.

Slavic languages tend to focus on the act of being born itself. The Polish urodziny comes from urodzić się, meaning to be born, and translates roughly as the event of being born.

East Asian languages commonly frame the idea around birth or life combined with day. The Japanese 誕生日, pronounced tanjōbi, joins characters meaning birth, to be born, and day. The Korean 생일, saeng-il, combines the words for life or birth and day.

Some languages emphasize the annual return rather than the birth itself. The French anniversaire comes from the Latin anniversarius, built from annus, year, and vertere, to turn, and originally described any yearly anniversary rather than birthdays specifically. The Dutch verjaardag similarly means year day or returning day, from jaar and dag.

There is a useful distinction between a birthday and a birthdate. A birthday is the annual anniversary of the day you were born, such as January 1st, while a birthdate is the full date of your birth, such as January 1st, 2000.

A half-birthday falls roughly six months from someone’s birthday. People observe half-birthdays when the actual birthday lands near a major holiday that tends to absorb attention, or when a child’s birthday falls during summer and they want to mark it with classmates during the school year, sometimes with a half-sized cake.

An unbirthday is any day that happens not to be your birthday. The concept originated in Lewis Carroll’s 1871 novel Through the Looking-Glass and later entered popular culture through the Unbirthday Song in Disney’s 1951 animated film Alice in Wonderland.

Many religions honor the birth of significant figures with dedicated holidays, including Christmas for Jesus, Mawlid for the Prophet Muhammad, Buddha’s Birthday, Krishna Janmashtami in Hinduism, and the Gurpurbs that honor the Sikh Gurus.

The earliest documented birthday observances go back thousands of years, though they were typically reserved for rulers and religious figures rather than ordinary people. In ancient Egypt around 3000 BCE, pharaohs marked coronation anniversaries, which were sometimes described as a birth because the act of becoming king was understood to transform a man into a divine being. Scholars continue to debate whether these events were literal birthdays or accession commemorations. One of the earliest written references to a birthday feast appears in Genesis 40:20, where Pharaoh holds a celebration.

Around 700 to 500 BCE, ancient Greeks honored the birthdays of their gods. Worshippers of Artemis brought candle-lit cakes to her temple, the candles representing the glow of the moon and prayers ascending toward the divine. This practice may have planted the seed for the modern birthday candle tradition.

The Greek historian Herodotus recorded that wealthy Persians around 500 BCE considered birthdays among the most significant days of the year and marked them with lavish feasts.

The Romans, beginning around 100 BCE, were among the earliest peoples known to celebrate personal birthdays with some regularity. Wealthy Roman men observed the dies natalis, the day of birth. Women were eventually included in birthday celebrations later in the imperial period, and the birthdays of emperors frequently became public holidays.

In Judaism, the Torah references Pharaoh’s birthday in Genesis 40:20. Rabbinic opinion on birthday celebrations has varied across history, though the practice is broadly accepted among Jews today.

Early Christians generally discouraged marking birthdays, viewing them as customs rooted in paganism. They chose instead to honor saints’ feast days and the anniversaries of martyrs’ deaths. Jehovah’s Witnesses continue to avoid birthday celebrations for related theological reasons.

In many Roman Catholic and Eastern Orthodox countries, people observe a name day on the feast day of the saint they are named after. Children were sometimes deliberately named after the saint whose feast day fell on the day of their birth or baptism. Noel and Pascal are familiar examples of names drawn directly from religious occasions.

Birthday celebrations are not a part of traditional Islamic observance, and many Muslims do not celebrate them. Others do, particularly in Western contexts, as long as the celebration does not conflict with Islamic principles.

Many Hindus mark birthdays according to the lunar or solar calendar, guided by the Janma Nakshatra, the birth star under which they were born. Traditional Hindu thought regards death as spiritually weightier than birth, since it represents release from the cycle of rebirth. Rituals for departed family members are commonly observed on the fifth and eleventh days following death.

Modern birthday parties are a relatively recent development. German aristocrats began holding children’s birthday celebrations called Kinderfeste during the eighteenth century. By the nineteenth and early twentieth centuries, parties featuring cakes, candles, gifts, and games had spread to ordinary families throughout Europe and North America.

The Chinese word for age, suì, differs from the standard word for year, nián, a distinction rooted in ancient Chinese astrology that linked a person’s destiny to Jupiter’s twelve-year cycle, which survives today as the Chinese zodiac. Traditionally, a person was considered one year old at birth, and everyone aged together at each Chinese New Year rather than individually on their own birthdays.

Chinese birthdays have traditionally been observed according to the lunisolar calendar. Common customs include eating longevity noodles, giving hongbao filled with money, offering rice or osmanthus wine as gifts, and in more recent times sharing western-style cakes. Adults typically receive less attention than children, though milestone birthdays are often marked with large family banquets.

Japan followed the Chinese age-reckoning system until the Meiji Reforms changed the practice. Birthday celebrations became significantly more common in Japan after World War II. Children’s birthdays generally involve cakes, candles, and singing, while many adults celebrate more quietly with a partner or immediate family.

In North Korea, Kim Il Sung’s birthday is observed as the Day of the Sun and is the country’s most important public holiday. Kim Jong Il’s birthday is known as the Day of the Shining Star. Citizens are generally not permitted to celebrate personal birthdays on July 8 or December 17, the dates of the leaders’ deaths, so those born on those dates typically celebrate a day later instead.

American children did not regularly celebrate birthdays at commercial venues until the late 1970s and particularly the 1980s. Through the 1800s and early 1900s, birthday parties were modest home gatherings. By the 1920s through the 1950s, home parties with cake, ice cream, and neighborhood children had become standard among middle-class families. Commercial venues including bowling alleys and restaurants began to appear more commonly during the 1960s and 1970s, but it was the rise of Chuck E. Cheese after 1977 that truly established the destination birthday party as a concept. By the 1990s and 2000s, celebrations at trampoline parks, laser tag centers, movie theaters, museums, and indoor playgrounds had become a routine part of childhood for many American families.

Some of history’s most spectacular birthday observances belonged to rulers with essentially unlimited resources.

Nero marked his birthdays with gladiator contests, theatrical performances, public banquets, religious ceremonies, and extravagant gifts delivered by wealthy citizens.

Louis XIV celebrated at Versailles with court balls, fireworks, operas, hunting displays, elaborate feasts served on gold and silver, and ceremonies drawing thousands of nobles.

The Persian ruler Nader Shah hosted enormous banquets accompanied by decorated elephants and horses, musicians, entertainers, priceless jewels, and treasures accumulated through his conquests.

The Qianlong Emperor’s eightieth birthday in 1790 stands as one of the largest imperial celebrations on record, filling Beijing for weeks with processions, theatrical performances, tribute gifts, banquets, and thousands of performers. Historians have suggested the cost of the festivities may have added meaningful strain to Qing dynasty finances.

Queen Elizabeth II’s eightieth birthday in 2006 was marked by multiple public celebrations across the United Kingdom attended by thousands, reflecting how royal birthdays have shifted from private extravagance to shared public occasions.